KINGSOLAR&trade; Flexible Solar Panel 50W 18V ETFE Bendable Ultra Thin Solar Charger with MC4 Cable Charging for Car Boat Battery ETFE MATERIALDifferent from PET solar panel,the transmitance of ETFE material as high as 95%,better at high temperature resistance,anti-corrosion,anti-fouling,easier to clean HIGH EFFICIENCY: Sunpower solar cell,the conversion up to 23.5%,with excellent weak light sensitivity,the internal blocking diode which prevents reverse current drain at night GOOD BENDABILITY: The solar panel can be curved to a maximum 30 degree arc,allowing to be mounted on an RV, boat, cabin, tent, car, trucks, trailers or any other irregular surface SUPERIOR DURABILITY: This solar panel is made of advanced water resistant material,the junction box is sealed and waterproof,the copper wire is protected by 3-layers plastic film EASY INSTALLATION:Only 0.1 in thick and weighs only 2.4 lbsthis solar panel is easy to transport,ang,and remove,6 stainless eyelets at the edges for easy installation;can be easily affixed by adhesives,silicon glues,double sticky tape,zip ties or velcro